When the option is set to off, a null user connection to the filer is allowed and the enumeration of shares presented on your filer will succeed. Turning the option to onwill allow a null user to map ...When the option is set to off, a null user connection to the filer is allowed and the enumeration of shares presented on your filer will succeed. Turning the option to onwill allow a null user to map to the filer but will deny the enumeration of shares. When attempting to restrict the abilities of the anonymous user, you can set a new option on the filer to three different settings depending on your needs.